System information

Chapter 3 Initially Configuring the ATM Switch Router
Configuring Redundancy and Enhanced High System Availability (Catalyst 8540 MSR)
3-25
ATM Switch Router Software Configuration Guide
78-6277-03, Cisco IOS Release 12.0(13)W5(19)
Configuring Route Processor Redundancy (Catalyst 8540 MSR)
For redundant operation, the following requirements must be met:
• Two route processors and three switch cards are required.
• The route processors must have identical hardware configurations. This includes variables such as
DRAM size, presence or absence of network clock modules, and so on.
• Both route processors must have the same functional image. For more information, see the
“Maintaining Functional Images (Catalyst 8540 MSR)” section on page 22-5.
• Both route processors must be running the same system image.
• Both route processors must be set to autoboot (a default setting).
If these requirements are met, the ATM switch router runs in redundant mode by default. The tasks
described in the following sections are optional and used only to change nondefault values.
Forcing a Route Processor Switchover (Catalyst 8540 MSR)
You can manually force the secondary route processor to take over as primary. To do so, use the
following privileged EXEC command:
As long as you have not changed the default configuration register setting, which is set to autoboot
by default, the secondary route processor (formerly the primary) completes the boot process from
standby mode.
If you have changed the default configuration register value, you can change it back to autoboot, and
ensure that the correct system image is used at startup, by performing the following steps, beginning in
global configuration mode:
Note If the secondary route processor remains in ROM monitor mode, you can manually boot
the processor from either the bootflash or Flash PC card.
Command Purpose
redundancy force-failover main-cpu Forces a route processor switchover.
Command Purpose
Step 1
Switch(config)# config-register 0x2102 Sets the config register for autoboot.
Step 2
Switch(config)# boot system {[device:]filename
[hostname | ip-address]|flash [device:][filename]
| mop filename [type] [card/subcard/port] | rcp
filename [ip-address] | rom | tftp filename
[hostname | ip-address]}
Specifies the system image file to load at startup.
Step 3
Switch(config)# end
Switch#
Returns to privileged EXEC mode.
Step 4
Switch# copy running-config startup-config Saves the configuration to NVRAM.